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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2016
Equity [Abstract] |
Summary of Authorized Outstanding Preferred and Common Stock | As of December 31, 2016, 2015 and 2014 the Company’s authorized and outstanding preferred and common stock was as follows:
|  | No. of Shares Authorized at |  |  | No. of Shares Outstanding at December 31, |  |  |  |  |  |  |  |  |
Class of Stock |  | December 31, 2016 |  |  | 2016 |  |  | 2015 |  |  | 2014 |  |  | Par Value Per Share |  |  | Dividends |  | Voting Rights
Senior Preferred |  |  | 10,000,000 |  |  |  | — |  |  |  | — |  |  |  | — |  |  | $ | 1.00 |  |  | As declared |  | Voting
10% Cumulative Preferred |  |  | 900,000 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 5.00 |  |  | As declared |  | Non-voting
Common |  |  | 20,000,000 |  |  |  | 15,810,935 |  |  |  | 15,597,446 |  |  |  | 15,504,513 |  |  |  | 1.00 |  |  | As declared |  | Voting
Summary of Shares Repurchased Under Stock Purchase Program | The following table is a summary of the shares under the program:
|  | Year Ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Number of shares repurchased |  |  | 100,000 |  |  |  | 28,447 |  |  |  | — |
Average price of shares repurchased |  | $ | 55.23 |  |  | $ | 58.19 |  |  | $ | — |
Shares remaining to be repurchased |  |  | 150,000 |  |  |  | 166,276 |  |  |  | 194,723 |
Required Capital Amounts and Company's Respective Ratios | The actual and required capital amounts and ratios are shown in the following table:
|  |  |  |  |  |  |  |  |  | Required |  |  |  |  |  | To Be Well |
|  |  |  |  |  |  |  |  |  | For Capital |  |  | With |  |  | Capitalized Under |
|  |  |  |  |  |  |  |  |  | Adequacy |  |  | Capital Conservation |  |  | Prompt Corrective |
|  | Actual |  |  | Purposes |  |  | Buffer |  |  | Action Provisions |
|  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |
|  | (Dollars in thousands) |
As of December 31, 2016: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 728,635 |  |  |  | 15.33 | % |  | $ | 380,351 |  |  |  | 8.00% |  |  | $ | 410,066 |  |  |  | 8.625 | % |  | N/A |  |  | N/A |
BancFirst |  |  | 655,620 |  |  |  | 13.80 | % |  |  | 379,948 |  |  |  | 8.00% |  |  |  | 409,631 |  |  |  | 8.625 | % |  | $ | 474,934 |  |  |  | 10.00 | %
Common Equity Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 648,942 |  |  |  | 13.65 | % |  | $ | 213,947 |  |  |  | 4.50% |  |  | $ | 243,662 |  |  |  | 5.125 | % |  | N/A |  |  | N/A |
BancFirst |  |  | 586,927 |  |  |  | 12.36 | % |  |  | 213,720 |  |  |  | 4.50% |  |  |  | 243,404 |  |  |  | 5.125 | % |  | $ | 308,707 |  |  |  | 6.50 | %
Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 679,942 |  |  |  | 14.30 | % |  | $ | 285,263 |  |  |  | 6.00% |  |  | $ | 314,978 |  |  |  | 6.625 | % |  | N/A |  |  | N/A |
BancFirst |  |  | 606,927 |  |  |  | 12.78 | % |  |  | 284,961 |  |  |  | 6.00% |  |  |  | 314,644 |  |  |  | 6.625 | % |  | $ | 379,948 |  |  |  | 8.00 | %
Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Total Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 679,942 |  |  |  | 9.94 | % |  | $ | 273,510 |  |  |  | 4.00% |  |  | N/A |  |  | N/A |  |  | N/A |  |  | N/A |
BancFirst |  |  | 606,927 |  |  |  | 8.89 | % |  |  | 273,152 |  |  |  | 4.00% |  |  | N/A |  |  | N/A |  |  | $ | 341,440 |  |  |  | 5.00 | %
As of December 31, 2015: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 669,213 |  |  |  | 14.47 | % |  | $ | 370,094 |  |  |  | 8.00% |  |  | N/A |  |  |  | 8.625 | % |  | N/A |  |  | N/A |
BancFirst |  |  | 607,604 |  |  |  | 13.15 | % |  |  | 369,607 |  |  |  | 8.00% |  |  | N/A |  |  |  | 8.625 | % |  | $ | 462,009 |  |  |  | 10.00 | %
Common Equity Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 596,547 |  |  |  | 12.90 | % |  | $ | 208,178 |  |  |  | 4.50% |  |  | N/A |  |  |  | 5.125 | % |  | N/A |  |  | N/A |
BancFirst |  |  | 545,938 |  |  |  | 11.82 | % |  |  | 207,904 |  |  |  | 4.50% |  |  | N/A |  |  |  | 5.125 | % |  | $ | 300,306 |  |  |  | 6.50 | %
Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 627,547 |  |  |  | 13.57 | % |  | $ | 277,570 |  |  |  | 6.00% |  |  | N/A |  |  |  | 6.625 | % |  | N/A |  |  | N/A |
BancFirst |  |  | 565,938 |  |  |  | 12.25 | % |  |  | 277,205 |  |  |  | 6.00% |  |  | N/A |  |  |  | 6.625 | % |  | $ | 369,607 |  |  |  | 8.00 | %
Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Total Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 627,547 |  |  |  | 9.49 | % |  | $ | 264,333 |  |  |  | 4.00% |  |  | N/A |  |  | N/A |  |  | N/A |  |  | N/A |
BancFirst |  |  | 565,938 |  |  |  | 8.59 | % |  |  | 263,606 |  |  |  | 4.00% |  |  | N/A |  |  | N/A |  |  | $ | 329,507 |  |  |  | 5.00 | %

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- Definition Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65877616&loc=d3e177068-122764 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21553-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65888546&loc=d3e21300-112643 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 + Details
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